<template>
    <div>
        <el-breadcrumb separator-class="iconfont icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item><el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域 -->
    <el-card>
      <!--提示区域-->
      <el-alert
    title="添加商品信息"
    type="info" center show-icon :closable="false">
     </el-alert>
     <!--步骤条区域-->
     <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>

<!-- tab 栏区域-->
<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
 <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
      <el-form-item label="商品名称" prop="goods_name">
        <el-input v-model="addForm.goods_name"></el-input>
      </el-form-item>
      <el-form-item label="商品价格" prop="goods_price">
        <el-input v-model="addForm.goods_price" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品重量" prop="goods_weight">
        <el-input v-model="addForm.goods_weight" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品数量" prop="goods_number">
        <el-input v-model="addForm.goods_number" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品分类" prop="goods_number">
          <el-cascader
    v-model="addForm.goods_cat"
    :options="catelist"
    :props="cateProps"
    @change="handleChange"></el-cascader>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数"  name="1">
      <!-- 渲染表单的Item项-->
      <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
      <!--复选框组-->
        <el-checkbox-group v-model="item.attr_vals">
        <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
  </el-checkbox-group>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
      <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id" border>
        <el-input v-model="item.attr_vals">
        </el-input>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
    <!--action 表示图片要上传到的API 的地址-->
      <el-upload
  :action="uploadURL"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  list-type="picture"
  :headers="headerObj" :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
    <!--富文本编辑器-->
      <quill-editor  v-model="addForm.goods_introduce" >
     </quill-editor> 
      <!-- 添加商品的按钮 -->
      <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
</el-form>
    </el-card>

    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="30%">
  <img :src="previewPath" alt=""  class="previewImg"/>
  <span>这是一段信息</span>
</el-dialog>

</div>
</template>
<script>
import _ from 'lodash'
export default {
   data() {
      return {
        activeIndex: '0',
        // 添加商品的表单数据对象
        addForm: {
          goods_name: '',
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          // 商品所属分类数组
          goods_cat: [],
          // 图片的数组
          pics: [],
          // 商品详情描述
          goods_introduce: '',
          
          attrs: []
          
        },
        addFormRules: {
          goods_name: [
            {required: true, message:'请输入商品名称', trigger: 'blur'}
          ],
          goods_price: [
            {required: true, message:'请输入商品价格', trigger: 'blur'}
          ],
          goods_weight: [
            {required: true, message:'请输入商品重量', trigger: 'blur'},
          ],
           goods_number: [
            {required: true, message:'请输入商品数量', trigger: 'blur'},
          ],
          goods_cat: [
            {required: true, message:'请选择商品分类', trigger: 'blur'},
          ],
        },
        // 商品分类列表
        catelist: [],
        cateProps: {
          expandTrigger: 'hover',
          label: 'cat_name',
          value: 'cat_id',
          children: 'children'
        },
        // 动态参数列表数据
        manyTableData: [],
        // 静态属性列表数据
        onlyTableData: [],
        // uploadUrl
        uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload ',
        // 图片上传组件的headers请求头对象
        headerObj: {
          Authorization: window.sessionStorage.getItem('token')
        },
        previewPath: '',
        previewVisible: false
      }
   },
  created() {
     this.getCateList()
   },
   methods: {
     // 获取所有商品分类数据
     async getCateList() {
      const {data: res}  = await this.$http.get('categories')

      if(res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败！')
      }   
        this.catelist = res.data
        console.log(this.catelist)
     },
     //级联选择器选项变化，触发的事件
     handleChange() {
       console.log(this.addForm.goods_cat)
       if(this.addForm.goods_cat.length !== 3) {
         this.addForm.goods_cat = []
       }
     },
     beforeTabLeave(activeName, oldActiveName) {
       if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
         this.$message.error('请先选择商品分类！')
         return false
       }
     },
     async tabClicked() {
       // 证明访问的动态的参数面板
       if(this.activeIndex === '1') {
        const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel:'many'}})

        if(res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
    
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
       } else if (this.activeIndex === '2') {
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params: {sel:'only'}})

        if(res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        this.onlyTableData = res.data
       }
     },
     // 处理图片预览效果
     handlePreview(file) {
       console.log(file)
       this.previewPath = file.response.data.url
       this.previewVisible = true
     },
     // 处理移除图片的操作
     handleRemove(file) {
       // 获取将要删除的图片临时路径
       const filePath = file.response.data.tmp_path
       // 从pics数组中，找到这个图片对应的索引值
       const i = this.addForm.pics.findIndex(x => x.pic === filePath)
       // 调用数组的splice 方法，把图片信息对象，从pics数组中移除
       this.addForm.pics.splice(i,1)
     },
     // 监听图片上传成功的事件
     handleSuccess(response) {
       // 1、拼接得到一个图片信息对象
          const picInfo = {pic: response.data.tmp_path}
        // 2、将图片信息push到pics数组中
          this.addForm.pics.push(picInfo)
     },
     // 添加商品
     add() {
       this.$refs.addFormRef.validate(async valid => {
         if(!valid) {
           return this.$message.error('请填写必要的表单项')
         }
         // 执行添加的业务逻辑
         // loadash cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo ={
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" ")
          }
          this.addForm.attrs.push(newInfo)
        })

        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {attr_id: item.attr_id,
          attr_value: item.attr_vals
          }

          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求添加商品
        // 商品的名称。必须是唯一的
        const {data:res } = await this.$http.post('goods', form)

        if(res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }

        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
       })
     }
   },
   computed: {
     cateId() {
       if(this.addForm.goods_cat.length === 3) {
         return this.addForm.goods_cat[2]
       }
       return null
     }
   }
}
</script>
<style scoped lang="less">
.el-checkbox {
  margin: 0 5px 0 0 !important
}
.previewImg {
  width: 100%
}
.btnAdd {
  margin-top: 15px;
}
</style>
